superradiant scattering

superradiant scattering

[¦sü·pər′rād·ē·ənt ′skad·ə·riŋ]
(relativity)
The scattering of radiation from a black hole in such a way that the scattered radiation carries more energy than the incident radiation.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.